I have a 2004 dodge startus and it was leaking coolant and water from theromstat housing. This part was changed a year ago. Could the gasket go bad?

The water pumps have a small hole in or near the bottom. When the engine is cold, it will seal the hole but when it warms up, it will expand the seal and leak. You should be able to see coolant coming out from under the vehicle or using a mirror. If there is coolant coming out, replace the pump. Changing the gasket is not going to help if the internal seal in the pump is bad. Hope this helps.

Its real common for the water pumps to go on those especially with a 2.7 liter

Possible bad thermostat housing gasket,removed coolant and replaced gasket if you having replace the thermostat replace it if you going to removed and change it

The hole you are describing sounds to be the wheap hole for the water pump
years ago the first time i had that issue it drove me nuts to figure it out .. btw not really a job to take on by yourself as it is a chain driven motor, also make sure you are prepared to pay more than the mechanic tells you as it is common to have to change the chain tensioner after this repair (when they collapse the hydrolic unit alot of times they will not "re-inflate")

Thermostat Removal & Installation To Remove:

1. Before servicing the vehicle refer to the precautions at the beginning of this section.
2. Partially drain the coolant, (until the level is below the thermostat).
3. Remove or disconnect the following:
   • The air cleaner and duct assembly
   • The crossover exhaust pipe
   • The radiator hose from the thermostat housing
   • The thermostat housing bolts
   • Any remaining sealer from the bolt threads
     
     
   • The thermostat housing
   • The gasket
   • The thermostat

To Install:

1. Install or connect the following:
   • The thermostat
   • The thermostat housing
   • The gasket NOTE: Apply RTV sealer, GM P/N 1052366 or the equivalent, to the thermostat housing bolt threads.
     
   • The thermostat housing bolts
     1. Torque to: 18 ft. lbs. (25 Nm)
   • The radiator hose to the thermostat housing
   • The crossover exhaust pipe
   • The air cleaner and duct assembly
   • The coolant
2. Thoroughly inspect the cooling system for leaks.

thermostat housing was repalced on 2004 dodge stratus but is stil leaking from a hose. what could the problem be.

i think you are talking about going to the theromstat housing and you will not need a gasket inless you remove the housing

water pump failure, water pump on these run off the timing chain and the timing chain runs in oil, so they could not just put a weep hole on the pump because it would go strait to the oil pan, instead they redirected the coolant from the leaking pump to just below the thermostat housing. And good luck, it's at least a 6 hour job on these. Brandon-MO

make sure engine is cool then drain coolant by opening the drain plug at bottom of radiator. remove cap from radiator so coolant will continue to drain and when coolant is down enough to pull off upper radiator hose at intake then close drain, then remove two bolts at coolant housing and remove thermostate. clean gasket material from intake and housing and replace with new gasket and thermostate tighten bolts install hose fill rad with coolant water mix 50/50 and run engine with heat on floor until gets hot and you see coolant flowing in rad, install cap